To cite catR in publications use:

Magis D, Ra\^iche G (2012). “Random Generation of Response Patterns under Computerized Adaptive Testing with the R Package catR.” Journal of Statistical Software, 48(8), 1–31. doi:10.18637/jss.v048.i08.

Magis D, Barrada JR (2017). “Computerized Adaptive Testing with R: Recent Updates of the Package catR.” Journal of Statistical Software, Code Snippets, 76(1), 1–19. doi:10.18637/jss.v076.c01.

Corresponding BibTeX entries:

  @Article{,
    title = {Random Generation of Response Patterns under Computerized
      Adaptive Testing with the {R} Package {catR}},
    author = {David Magis and Gilles Ra\^iche},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {48},
    number = {8},
    pages = {1--31},
    doi = {10.18637/jss.v048.i08},
  }

  @Article{,
    title = {Computerized Adaptive Testing with {R}: Recent Updates of
      the Package {catR}},
    author = {David Magis and Juan Ramon Barrada},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2017},
    volume = {76},
    number = {1},
    pages = {1--19},
    doi = {10.18637/jss.v076.c01},
  }